/*
 * Copyright 2010-2020 Alfresco Software, Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.activiti.engine.impl.bpmn.deployer;

import java.io.ByteArrayInputStream;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.activiti.engine.impl.bpmn.parser.BpmnParse;
import org.activiti.engine.impl.bpmn.parser.BpmnParser;
import org.activiti.engine.impl.cmd.DeploymentSettings;
import org.activiti.engine.impl.persistence.entity.DeploymentEntity;
import org.activiti.engine.impl.persistence.entity.ProcessDefinitionEntity;
import org.activiti.engine.impl.persistence.entity.ResourceEntity;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ParsedDeploymentBuilder {

	private static final Logger log = LoggerFactory.getLogger(ParsedDeploymentBuilder.class);

	protected DeploymentEntity deployment;
	protected BpmnParser bpmnParser;
	protected Map<String, Object> deploymentSettings;

	public ParsedDeploymentBuilder(DeploymentEntity deployment, BpmnParser bpmnParser, Map<String, Object> deploymentSettings) {
		this.deployment = deployment;
		this.bpmnParser = bpmnParser;
		this.deploymentSettings = deploymentSettings;
	}

	public ParsedDeployment build() {
		List<ProcessDefinitionEntity> processDefinitions = new ArrayList<ProcessDefinitionEntity>();
		Map<ProcessDefinitionEntity, BpmnParse> processDefinitionsToBpmnParseMap = new LinkedHashMap<ProcessDefinitionEntity, BpmnParse>();
		Map<ProcessDefinitionEntity, ResourceEntity> processDefinitionsToResourceMap = new LinkedHashMap<ProcessDefinitionEntity, ResourceEntity>();

		for (ResourceEntity resource : deployment.getResources().values()) {
			if (isBpmnResource(resource.getName())) {
				log.debug("Processing BPMN resource {}", resource.getName());
				BpmnParse parse = createBpmnParseFromResource(resource);
				for (ProcessDefinitionEntity processDefinition : parse.getProcessDefinitions()) {
					processDefinitions.add(processDefinition);
					processDefinitionsToBpmnParseMap.put(processDefinition, parse);
					processDefinitionsToResourceMap.put(processDefinition, resource);
				}
			}
		}

		return new ParsedDeployment(deployment, processDefinitions, processDefinitionsToBpmnParseMap, processDefinitionsToResourceMap);
	}

	protected BpmnParse createBpmnParseFromResource(ResourceEntity resource) {
		String resourceName = resource.getName();
		ByteArrayInputStream inputStream = new ByteArrayInputStream(resource.getBytes());

		BpmnParse bpmnParse = bpmnParser.createParse()
				.sourceInputStream(inputStream).setSourceSystemId(resourceName)
				.deployment(deployment).name(resourceName);

		if (deploymentSettings != null) {

			// Schema validation if needed
			if (deploymentSettings.containsKey(DeploymentSettings.IS_BPMN20_XSD_VALIDATION_ENABLED)) {
				bpmnParse
						.setValidateSchema((Boolean) deploymentSettings
								.get(DeploymentSettings.IS_BPMN20_XSD_VALIDATION_ENABLED));
			}

			// Process validation if needed
			if (deploymentSettings.containsKey(DeploymentSettings.IS_PROCESS_VALIDATION_ENABLED)) {
				bpmnParse.setValidateProcess((Boolean) deploymentSettings.get(DeploymentSettings.IS_PROCESS_VALIDATION_ENABLED));
			}

		} else {
			// On redeploy, we assume it is validated at the first deploy
			bpmnParse.setValidateSchema(false);
			bpmnParse.setValidateProcess(false);
		}

		bpmnParse.execute();
		return bpmnParse;
	}

	protected boolean isBpmnResource(String resourceName) {
		for (String suffix : ResourceNameUtil.BPMN_RESOURCE_SUFFIXES) {
			if (resourceName.endsWith(suffix)) {
				return true;
			}
		}

		return false;
	}

}
